DE3165562D1 - Telecommunication systems - Google Patents

Telecommunication systems

Info

Publication number
DE3165562D1
DE3165562D1 DE8181304109T DE3165562T DE3165562D1 DE 3165562 D1 DE3165562 D1 DE 3165562D1 DE 8181304109 T DE8181304109 T DE 8181304109T DE 3165562 T DE3165562 T DE 3165562T DE 3165562 D1 DE3165562 D1 DE 3165562D1
Authority
DE
Germany
Prior art keywords
highway
signals
outstations
receivers
modulator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8181304109T
Other languages
German (de)
Inventor
Alan Arthur Sadler
Brian Culshaw
Peter Raymond Ball
John Charles Pond
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Balfour Beatty PLC
Original Assignee
BICC PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BICC PLC filed Critical BICC PLC
Application granted granted Critical
Publication of DE3165562D1 publication Critical patent/DE3165562D1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication

Abstract

A simple two-way communication link by means of which data signals from a number of data inputs 17 at spaced positions along a highway 11 can be fed in individually in any desired sequence comprises a highway 11 constituted by an optical fibre; a gas laser 13 or other source of electromagnetic radiation of optical frequency at the end of the highway; a number of outstations 17 at spaced positions along the highway, each of which outstations comprises a modulator 18 for modulating a data signal onto a subcarrier which periodically varies the optical path lenght of a section of the highway with the modulated data signal, and has an associated receiver 20 for signals for controlling operation of the modulator; and, connected to the other end of the highway, a demodulator 16 and transmitter 21 for transmitting control signals to the receivers 20. Preferably the transmitter 21 and the receivers 20 are electrically interconnected by a pair of electric conductors constituting a leaky electric cable 12.
DE8181304109T 1980-09-08 1981-09-08 Telecommunication systems Expired DE3165562D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8028954 1980-09-08

Publications (1)

Publication Number Publication Date
DE3165562D1 true DE3165562D1 (en) 1984-09-20

Family

ID=10515931

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181304109T Expired DE3165562D1 (en) 1980-09-08 1981-09-08 Telecommunication systems

Country Status (4)

Country Link
EP (1) EP0047669B1 (en)
AT (1) ATE9050T1 (en)
DE (1) DE3165562D1 (en)
GB (2) GB2083983B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475191A (en) * 1982-12-10 1984-10-02 At&T Bell Laboratories Distributed time division multiplexing bus
GB2142508B (en) * 1983-06-29 1987-01-28 Private Mobile Rentals Limited Improvements relating to communications systems
US4622551A (en) * 1983-10-27 1986-11-11 Otis Elevator Company Half-duplex industrial communications system
GB8408323D0 (en) * 1984-03-30 1984-05-10 British Telecomm Cordless telephone
EP0176788B1 (en) * 1984-09-05 1989-12-13 Hitachi, Ltd. Multiplex communication system
GB8525413D0 (en) * 1985-10-15 1985-11-20 Plessey Co Plc Optical communications system
GB2182516A (en) * 1985-11-01 1987-05-13 Stc Plc Optical fibre network
CA2011303C (en) * 1989-03-02 1996-10-15 Shintaro Sentsui Method for identifying an optical transmission medium, apparatus for identifying the same and method for optical telecommunication
GB2265524B (en) * 1992-03-24 1995-09-20 Rohde & Schwarz Services Ltd Improvements in and relating to radio frequency communications systems
US5872934A (en) * 1996-08-26 1999-02-16 Sony Corporation Method and apparatus for connecting several video distribution units to a serial data bus
AUPO252696A0 (en) * 1996-09-23 1996-10-17 Thomson Marconi Sonar Pty Limited Electromagnetic communication between elongate structures

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4089585A (en) * 1974-12-18 1978-05-16 Bicc Limited Optical guides
GB1488253A (en) * 1974-12-19 1977-10-12 Davies D Telecommunication system
GB1479426A (en) * 1975-01-06 1977-07-13 Bicc Ltd Optical guides
GB1534786A (en) * 1976-06-29 1978-12-06 Standard Telephones Cables Ltd Data transmission system
US4086484A (en) * 1976-07-14 1978-04-25 International Telephone And Telegraph Corporation Optical amplitude modulation modulator
GB1543035A (en) * 1977-08-04 1979-03-28 Standard Telephones Cables Ltd Optical transmission receiver
GB2019561B (en) * 1978-04-20 1982-09-02 Davies D E N Telecommunication systems

Also Published As

Publication number Publication date
EP0047669A3 (en) 1982-04-07
EP0047669A2 (en) 1982-03-17
GB2083983A (en) 1982-03-31
GB2083983B (en) 1985-05-15
EP0047669B1 (en) 1984-08-15
GB2083311A (en) 1982-03-17
ATE9050T1 (en) 1984-09-15
GB2083311B (en) 1984-04-11

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee